QY55KA-Y Horizontal Cylinder Seal Kit P2
For procurement teams: Confirm which horizontal beam cylinder is leaking and provide the cylinder label plus old seal cross-sections.
Where It Works
Horizontal outrigger cylinders see dirt, long strokes and side-loading risk. A P2 kit works only when the cylinder surfaces and guides are healthy.
Before You Quote
Cylinder assembly number
Rod and bore measurements
Seal lip direction and profiles
Wear-ring and guide condition
Rod straightness and chrome finish
Failure Pattern and Root Cause
External leakage, internal drift and slow extension have different causes. Valve leakage, bent rods and worn guides must be separated from seal failure.
Installation Outcome to Verify
Clean the beam area before removal, protect the rod and deburr sharp edges. Reassemble with correct lip direction, bleed air and test extension, holding and retraction.
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Questions from Maintenance Teams
Can the kit fix internal drift?
Only if cylinder seals are the confirmed cause.
Why do seals fail again?
Contamination, scoring or side load may remain.
What photos help?
Cylinder label, rod, gland and old seal layout.
Seals are grouped by installation position and kept dust-free and flat.
